Pump



Sept. 7, 1943. R. w. GLAsNl-:R

PUMP

'Filed June 9, 1941 5 Sheets-Sheet 1 Sept. 7, 1943.

R. W. GLASNER PUMP Filed June 9. 1941 5 Sheets-Sheet 2 sept. 7, 1943.

PUMP` Filed June 9, 1941 5 Sheets-Sheet 4 uur ` R. w. GLAS'NER 2,328,717

Sept.' 7, 1943. R. w. GLASNER 2,328,717 l PUMP i Filed June 9, 1941 5Sheets-Sheet 5 Patented Sept. 7. 1943 PUDM? Rudolph W. Glasner, Chicago,Ill., assignor to Midland Machine Corporation, a corporation ci minorsApplication .nine 9, 194i, serian No. senese (ci. s-isi) 10 Claims.

o This invention relates in general to pumps or motors, but moreparticularly to the type generally known as radial piston pumps, and oneof the objects of the invention is to provide in a pump of thischaracter improved means whereby liquid may be pumped at high pressureand in a steady flow with no noticeable pressure fluctuations orpulsations by reason of the employment of a large number of pistonsoperating at a high rate or number of strokes per minute, to pump orcompress the liquid, while at the same time a large number of pistonsare operating to discharge the liquid.

Heretofore in pumps of this character there has been providedl a pistonoperating eccentrically mounted ring adapted to be bodily adjusted orshifted so as to vary the volume of delivery of the liquid, and this hasbeen accomplished by bodily sliding the ring edgewise within the pumpcasing.

The operating ring is very heavy and difficult to shift and thediiiculty of such an adjustment is greatly increased by reason of there-active pressure exerted by the pistons upon the ring.

In large pumps it has been attempted to overcome this objection anddimculty by providing roller surfaces for the ring to be adjusted upon,V

but such provision resulted in the production of a large construction ofpump, and an increase in the cost of manufacturing.

It is therefore another object of the present I invention to provide ina pump or motor of this character, an operating ring for the pistons,which is mounted for swinging or pivotal adjustment,- and which ringwill not only be subject to easy adjustment, but will also be sensitivein operation, due to the leverage produced by such swinging: or-pivotalmounting thereby obviating the necessity of having to bodily slide loradjust the entire ring and its cooperating parts.

line l-I Figure 2 of a pump of this character constructed in accordancewith the principles of this invention.

Figure 2 is a vertical sectional View taken on .line 2-2 Figure l.

Figure 3 is a detail perspective viewv of the pump casing with partsremoved.

Figure 4 is a detail perspective view of a portion of the pump casingwith parts removed, and with the rotatable cylinder barrel in position,parts of the pump being broken away.

Figure 5 is a detail perspective view of the rotatable cylinder barrelwith the piston impeller ring in position with respect thereto.

Figure 6 is a detail perspective view of the rotatable cylinder barrel.

Figure 'i is a detail perspective view of the stationary pintle andpintle head with parts in section.

Figure 8 is a view taken on line 8-8 Figure 7, partly in elevation andpartly in section.

Figure 9 is a sectional view taken on line 9-9 Figure 7.

Figure 10 is a sectional view taken on lines IU-III Figure '1.

Figure 1l is a front elevation of the pump, on a reduced scale, showingthe indicating gauges for indicating the position of the shifter ring.

Figure 12 is a detail sectional view of a modiiled form of the mechanismfor shifting the shifter ring.

Referring more particularlyto the drawings, the pump consistsessentially of a casing I5 preferably in the form of an annular ring andhavinga'sup'porting base IS-V-a. An end plate I6 is provided for thecasing and is secured in posi- V tion in any desired or suitable manner,such as A further object is to provide improved means 'for shifting thepump piston operating ring'.

, Astill further object is to provide improved means whereby thedirection of flow of the liquid into and out of the pump may be vreadilyreversed.

VTo the attainment of these ends and the accomplishment of other new anduseful objects as will appear, the inventionl consists in the featuresof novelty in substantially the construction, combination andarrangementv of th several parts hereinafter more fully described andclaimed and shown in the accompanying drawings illustrating thisinvention, and in which Figure 1 is a vertical sectional view taken onby means of screws or bolts I1.

The casing is provided in its wall with an outwardly opening recess I8and in the bottom of the recess Vthere is provided an opening I9 passingtherethrough.

'Ihe numeral 20 designates a pintle having a head 2|. The pintleprojects through the opening I9 in the wall of the casing and extendsinto the casingbut terminates short of the opposite wall.A The pintlehead 2| is seated within the recess I8 and is secured againstdisplacement in any suitable manner.`

The diameter of the pintle 20. is somewhat less than the diameter of theopening I9 in the casing wall and surrounding the pintle is a rotatablecylinder barrel 22, one end of which pro- .ects into the opening I9, andthis'end'is preferably reduced, as.- at 23, to form the seat for one ofthe members 24 of a bearing race, while the other member 25 of thebearing race contacts the wall of the opening I9, roller bearings `26being disposed between the race members 24-25.

The other end of the cylinder barrel 22 projectsinto an opening 21 inthe end plate |6, and a bearing plate 28 forms a closure for thisopening, being secured in position in any desired or suitable manner,such as by means of screws or bolts 29. The plate 28 is provided with alaterally projecting circumferential flange which projects into and hasbearing against the wall of 'the opening 21, and this ange surrounds oneend 22-0. of the barrel 22. This end 22--a of the barrel is reduced toform a seat for one of the race members of the roller bearing unit 36-3I- 32. The flange on the end 28 is also shaped` to form a seat for oneof the race members of the bearing.

With this construction, the pintle member being stationary, the cylindermember 22 may be rotated about the pintle, being supported by the rollerbearings. The bearing plate 28 is recessed to form a chamber 33 and theend of the cylinder member 22 is notched or recessed, as at 34 .(seeparticularly Figure 5).

A shaft 36 which may be a driven or a driving shaft projects through anopening 31 in the bearing plate 28 and is provided with an enlarged endportion 38 which is disposed within the chamber 33. This enlargedportion (see also Figure 4) projects into the notched or recessedportion 34 of the rotatable cylinder member 22 to form a connectiontherewith. and the shaft 36 is secured to the rotatable cylinder member22 in any desired or suitable manner, such as by means of screws orbolts 39, whereby the shaft 36 and the cylinder member 22 will rotatedvtogether.

The end 38 of the shaft 36 is recessed, as at 40, and the proximate endof the pintle 26 is reduced, as at 4|, so as to project into the recess40, roller bearings 42 being disposed between the reduced end 4| of thepintle 28 and the inner surface of the rotatable cylinder member 22, theroller bearings 42 serving as a means for supporting the end 4| of thepintle.

Within the cylinder member 22 is provided any desired number ofcylinders 43 preferably arranged in two separate series concentric withthe axis of the cylinder member. These cylinders are provided with openbottoms 44 which are movable into and out of registering relationrespectively with ports or passages 45-46 in the pintle 20. The ports orpassages 45 have communication with a passage 41 in the pintle 20 andtwo of such passages 41 (see particularly Figures 1 and 2) are providedand have communication with a chamber 48 in the pintle head that has anopening 49 in communication with the supply of iiuid.

'I'he ports or passages 46 have communication with similar passages 50in the pintle and these passages 50 have communication with a chamber 5lin the pintle head 2| and which chamber 5| has a discharge outlet 52connected to the discharge side of the pump.

As the piston member 22 isrotated some of the cylinders 43 havecommunication with the ports or passages 45 while others havecommunication with the ports or passages 46, so that when the cylindersare in communication with the passages 45 they will be supplied with theuld with the ports or passages and into communication with the ports orpassages 46, the fluid will be discharged through the latter ports orpassages, through the passage and out through the outlet 52. 'I'hus asthe cylinder member 22 rotates, the piston will alternately operate todraw in and create a pressure upon the liquid and then discharge thesame through the discharge passage 52.

The pintle 20 is also provided with ports or passages 53 (seeparticularly Figure 10) which have communication through ports orpassages 54 with the passages 58 in the pintle, and the pintle is alsoprovided with ports or passages 55 which have communication with thepassages 41 in the pintle through the passages 56.

These ports or passages 53-54-55--56 are provided so that they will beconnected with the pressure side of the pump, according to the directionof rotation of the cylinder member so as to equalize the pressure on thepintle 28.

The ports or passages 45-46 may be provided respectively with restrictedportions 51-58 to prevent a too sudden stopping of the pump as thedischarge of the iiuid out of the cylinders will be restricted.

In the cylinders 43 pistons 59 operate and these pistons are arranged inseries corresponding to the series of cylinders. Each piston is providedwith a head (see also Figures 5 and 6) which are preferably irregular incross-section so as to prevent them from rotating axially and theseheads operate in recesses 6| in the cylinder member.

A pin 62 passes through the heads of cooperating pistons 59 and projectsa substantial distance therebeyond. Rollers 63 are mounted upon the pins62 and have engagement with a roller track or ring 64. The track or ring64 is supported by end plates 65 of annular coniiguration and areprovided with hub portions 66 that encompass and are spaced from thecylinder member 22.

Arranged within the casing of the pump is a shifter ring 68 which isprovided with an arm or projection 69 by means of which the shifter ringmay be pivotally mounted withinthe pump casing. This mounting may beformed in any suitable manner but preferably by means of a pivot pin 18which passes through the arm or projection 69 and has bearings, as at 1|in the pump casing I5. One of the bearings 1| is preferably open and theother closed, and the open vend is closed by the end plate I6 of thecasing. 'I'he shifter ring 68 has connected to it end plates 12 whichare of annular conguration, the diameters of the openings in the endmembers 12 being substantially greater than the external diameter of thehub portions 66 ofthe end plates 65 which support the roller bearingring 64. Disposed between the inner peripheries of the end plates 12 andthe outer periphery of the respective hub portions 66 of the end plates65 are roller bearing members 13 by means of which the end plates 65 andthe roller track or ring 64 are supported so that when the shifter ringor member 68 is moved, in a manner to be hereinafteridescribed, theroller-track or ring member 64 and the end plates 65 will becorrespondingly shifted so that they will be moved into an eccentricposition with respect to the cylinder member so as to vary the quantityor volume of the liquid. By reason of the shifting of the shifter ringand its associated parts about its pivot 10 to onev side or the other ofthe vertical) ow of the fluid into and out of the passages 4'! and 5l)may be reversed. That is to say, when the shifter member is in aposition on one side of the vertical center, the passages 41 willconstitute the inlet passages and the passages 50 the outlet passages.the other-side of the vertical center, the direction of ow of the fluidwill be reversed by causing the passages 50 to be the inlet passages andthe passages 41 to be the discharge passages.

This is effected by reason of the fact that the shifter ring whichoperates the pistons will be moved to different eccentric positions withrespect to the axis of the rotatable cylinder member 22.

When the pump is started or running slowly, and there is not suiicientcentrifugal force to throw the pistons outwardly to create a suction todraw in the liquid, the pistons will be moved outwardly by reason of thegrooves 61 in the end plates 65 of the roller track or ring 64 intowhich grooves the ends of the pins 62 project. When, however, the speedof rotation of the cylinder member 22 is sufficient the pistons will bethrown out by centrifugal force but will be fo'lfcedin-` ber 'I8 havinga projection 'i9 thereon which lat-l ter extends through an opening 80in the wall of If the shifter ring is moved to the housing 15 andengages in a slot or recess 8l in the slide 14. Thus by operating thescrew 16' through the medium of the handle 'll it will be seen that theshifter ring can be moved to any desired position about its pivot. I

If desired and instead of operating the shifter ring manually as justdescribed, means may be provided whereby it may be actuated by fluidpressure, and to that end the chamber 'l5 may be provided in its wallwith openings 82-83 (see Figure 12) with which pipes 84-85 havecommunication. When fluid pressure is admitted through either oneY ofthese pipes into the chamber 'l5 the other will constitute an outletpipe. Thus by controlling in anyn desired or suitable manner notillustrated, the admission of the fluid into either one or the otherofthese pipes, the direction of adjustment ofthe shifter ring may becontrolled.

As a means for indicating the position of the shifter ring 68 or theextent'ofadjustment thereof, suitable indicating mechanism may beprovided. A simple and efficient means embodies, in the present form ofthe invention two plungers tt-Bl one of which is arranged on each sideof ly upon a suitable bracket 94.

as at 9|, with an indicator or pointer 92, the latter beingpivotallymounted, as at 93, respective- These pointers respectively cooperatewith graduations or indications 95 provided on a suitable dial 96.

Thus it will be seen that when the shifter ring is moved in onedirection or the other, from its central or neutral position, it will beswung about its pivot and such direction of movement and position of theshifter ring will be indicated by the indicators 92 cooperating with thegraduations 95.

'It is thought the operation of the pump willbe clearly understood fromthe foregoing but briefly. stated, it is as follows:

Upon the starting of the pump by actuating the drive shaft 36 thecylinder member 22 will be rotated about the pintle 20 and until thevspeed o'f rotation of the cylinder member 22 is sufficient to throw.the plunger 59 outwardly to draw or suck in the fiuid, the pistons willbe given this movement by means of the grooves 67| in the end plates 65of the roller or track ring 64.

When, however, the speed is sufficiently increased the plungers 59 willbe thrown outwardly by centrifugal force.

During the time that the cylinders 43 are in.

will be increased and the passages 41 will serve as inlet passages, andthe passages 59 serve as outlet passages. Therefore, by thusadjustingthe shifter ring vthe volume or pressure may be controlled.

-However, should the shifter ring lbe moved about its pivotto the otherside of the vertical center from the position shown in Figure 2, thedirection of flow of `the uid will be reversed. That is to say.thepassages 50 will then become inlet passages while thepassages 4l willbecome During this direction of now of fluid its pressure or volume maybe varied in outlet passages.

a similar manner. t With the present invention it will be noted thatthere are a large number of cylinders and pistons employed and byreasons of the pistons the pivot of the shifter ring and are adapted tobe I' respectively engaged by surfaces 88 on the shifter ring. lTheseplungers may be held by means of a spring 89 against therespeotive'surfaces 88- so that when the shifter ring is moved in onedirection or the other, one o'r the other of the plungers 86 will bemoved against the stress of itsspring 89, while the other of theplungers per minutes. -liquid will be pumped at a high pressure and in asteadyilow with no noticeable pressure fluctuations.

Furthermore, the pump is adapted for a varia- I tion in the volumedelivery and reversal of the flow of the fluid. Y

It will also be manifest that the shifter ring being mounted for pivotalmovement will be very easy of adjustment and that it will not benecessary to move or shift the entire weight of the ring or overcome there-active pressure of the pistons upon the roller track or ring.Furthermore, with the present invention it is not only easy to adjustthe pump to vary the volume or pressure, but such adjustment is of avery sensitive nature'due to the leverage produced by theA pivotalmounting of the shifter ring.

While the preferred forms of the invention have been herein shown anddescribed, it is to be understood that various changes may be-made inthe details of construction and in the combination and arrangement ofthe several parts within the scope of the claims, without departing fromthe spirit of this invention.

What is claimed as new is:

1. An hydraulic pump or motor vembodying a cylinder member rotatable ina casing and having cylinder bores, a stationary pintle about which thecylinder member rotates, pistons reciprocable in the cylinder bores, apiston actuating ring surrounding the cylinder member engaging andoperating said pistons as the cylinder member is rotated, a shifter ringencompassing said actuating ring, means mounting said shifter ring forpivotal movement, means 'for moving said shifter ring about its pivot toshift said piston actuating ring for varying the volume of delivery ofthe pump, roller bearings between said cylinder member and the pumpcasing, roller bearings between said actuating and shifter rings, androller bearings between the end of said pintle and the cylinder memberand housed within the latter for supporting the end of the pintle.

2. In a rotary radial piston pump or motor, a cylinder barrel rotatablein a casing and having a plurality of radial cylinders, pistonsreciprocable in the cylinders, a pintle projecting into the casing andabout which the cylinder barrel rotates, a piston actuating ringencompassing the cylinder barrel, anti-friction rollers carried by thepiston and engaging said ring whereby upon rotation of the cylinderbarrel the pistons will be operated, a shifter ring encompassing saidactuating ring, means anchoring said shifter ring to the pump casingvfor pivotal movement With respect thereto, means for swinging saidshifter ring about its pivot to shift the said operating ring to varythe volume delivery of the pump,` and roller bearings respectivelybetween the cylinder member and the casing, the cylinder member and thepintle, and the shifter ring and the piston actuating ring.

3. In combination, an hydraulic pump or motor embodying a shaftprojecting into the pump casing, a pintle alined with said shaft andalso projecting into the casing and terminating in proximity to theshaft, said shaft being rotatable with respect to the pintle, the end ofsaid pintle being reduced and projecting into a recess in the end of theshaft, said reduced end forming a shoulder on the pintle spaced from theproximate end of the shaft, a cylinder barrel rotatable about saidpintle, roller bearings in the said space and vsurrounding the reducedend of the pintle and encompassed by said rotatable barrel, whereby tosupportthe end of the pintle, radial cylinders in the barrel, pistonsoperating in the cylinders, an operating ring for the pistons, a shifterring encompassing the operating ring, means for shifting the shifter.ring and with it the said operating ring, and an operative connectionbetween said shaft and said cylinder barrel, there being fluid inlet andoutlet openings in 'said pintle.

4. In combination, an hydraulic pump or mctor embodying a shaftprojecting into the pump casing, a pintle alined with said shaft andalso projecting into the casing and terminating in proximity to theshaft, the proximate ends of said pintle and shaft being provided onewith a reduced extremity and the other a recess into which said reducedend extends to support the end of the pintle and whereby one will berotatable with respect to the other, a cylinder barrel rotatable aboutsaid pintle, roller bearings housed within said barrel and encompassingthe end of the pintle for supporting the latter, radial cylinders in thebarrel, pistons operating in the cylinders, an operating ring for thepistons, a pivotally mounted shifter ring encompassing the saidoperating ring, means for swinging said shifter ringabout its pivot, andan operative connection between said cylinder barrel and said shaft.

5. A pump assembly embodying a casing, a

cylinder barrel rotatable therein and having radial cylinder bores, anactuator member for the pistons, a pivotally mounted shifter ringencompassing the actuator member, means for shifting said shifter ringto vary the volume of delivery of the pump, and indicating 'meansextending from the inside of the pump casing to the outside thereof andpositioned by the movement of said .shifter ring to provide visiblemeans for indicating the position of said shifter ring.

6. A pump assembly embodying a casing, a cylinder barrel rotatabletherein and having radial cylinder bores, an actuator member for thepistons, a shifter member encompassing the actuator member, means forshifting the shifter member, and means exterior of the pump casing forindicating the position of said shifter member, the last said meansembodying an indicator and a pointer cooperating therewith and movableonev with respect to the other, one of the elements of the indicatingmeans embodying a spring-pressed plunger projecting beyond the outerface of the casing and engaged byr said shifter ring to be operatedthereby.

7. A pump assembly embodying a casing, a cylinder barrel rotatabletherein and having radial cylinder bores, an actuator member for thepistons, a shifter member encompassing the actuator member, means forshifting the shifter member, and means exterior of the pump casing Vforindicating the position of said shifter member, the last said meansembodying an indicator and a pointer cooperating therewith and movableone with respect to the other, one of the elements of the indicatingmeans being operable `by the movement of said shifter member, one ofsaid indicating means being disposed on each side of the center of thepump casing and each jecting beyond the said casing and engaged by saidshifter member.

8. A pump assembly embodying a casing, a cylinder barrel with aplurality of series of radial cylinder bores laterally spaced, pistonsreciproeating in said bores, an actuator ring encompassing the cylinderbarrel and operating upon the ends of the pistons, a pintle having inletand outlet discharge openings with which the cylinders of each seriesare brought into and out of communication.` annular side plates for theactuator ring, said plates provided with laterally projecting hubsencompassing the pintle, the interior diameter of the hubs beingconsiderably greater than the exterior diameter of said pintle, ashifter ring encompassing said actuator ring, means pivotally A mountingsaid shifter ring. means for swinging said shifter ring about its pivot,roller bearing pins connected with proximate pairs; of pistons of theadjacent series, said pins projecting beyond the pistons, annular sideplates for said shifter ring, into the openings of which last saidplates the hubs on said side plates of the actuator ring project, androller bearings between said hubs and the walls` of the openings in saidside plates of said actuator ring, the said side plates of sad'actuatorring having grooves' into which the ends of said'pins project, to beguided thereby and to assist in the operation of said pistons.

9. A radial pump embodying a casing, a pintleY member projecting intothe.casng through one wall thereof, said pintle provided with-an en-Iarged head having two chambers' therein out of communication with eachother and having uid ingress and egress openings, there beinglongitudinal passages in said pintle communicating at one end with therespective said chambers,'.

there being a recess in the casing wall encompassing the opening throughwhich the pintle projects and into which recess the said head is seated,a cylinder member rotatable about said pintle and having bores, eachprovided with an opening in one wall thereof, there "being radial meansfor swinging said shifter ring about its pivot to vary the volumedelivery of thepump, and means for rotating said cylinder member.

10. A radial pump embodying a casing, a pintle member Yprojecting intothe casing through one wall thereof, said pintle provided with anenlarged head having two chambers therein out of communication with eachother and having iluid ingress and egress openings, there beinglongitudinal passages in said pintle communicating at one end with Itherespective said chambers, there being a recess in the casing wallencompassing 'the opening through which the pintle projects and intowhich recess the said head is seated, a cylinder member rotatable aboutsaid pintle and having bores, each provided with an opening in one' wallthereof, there being radial openings in the pintle in communication withsaid longitudinal passages, and with which radial openings the openingin the wall of the cylinders A respectively move into and out ofcommunication as the cylinder member is rotated, pistons in thecylinders, an actuator ring encompassing the pistons for operating them,a pivotally mounted shifter ring encompassing the actuator ring, meansfor swinging said shifter ring about its pivot to vary the volumedelivery of the pump, means for rotating said cylinder member, androller bearings between the end. of said pintle and the cylinder memberand housed within the latter for supporting the end of the pintle.RUDOLPH W'. GLASNER.

